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Need Help about fortran (g77)

  1. Mar 12, 2009 #1
    I came across a problem on the project:
    my project is comprised of tens of fortran files. There is a param.h header file collecting all the parameters that are used by the program and subroutines. but after I add this line:
    parameter(pi = dacos(-1.0d0))
    into the param.h
    the command "make " always reports errors like:

    param.h: In subroutine `stressinit':
    parameter(pi = dacos(-1.0d0))
    Invalid declaration of or reference to symbol `dacos' at (^) [initially seen at (^)]

    How to employ the function "dacos" in a header file?
    Thanks a lot.
  2. jcsd
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